I was wondering if anything would come along that would make me feel like I should succumb again to Spelunky's life-devouring capabilities in paying-for-it mode after I finally escaped from the original free version.

Metroid as a Roguelike may just be that thing (okay, it looks more like it's just Spelunky with a lovingly created Metroid skin. I didn't watch the whole half-hour video, but enough to see that the modders hadn't gone quite all the way to Metroiguelike territory like I'd initially hoped).